<template>
	<view class="goods-detail-container">
		<!-- 轮播图区域 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" circular>
			<swiper-item v-for="(item,index) in goods_info.pics" :key="index">
				<image @click="preview(index)" class="image" :src="item.pics_big" mode=""></image>
			</swiper-item>
		</swiper>
		
		<!-- 商品信息区域 -->
		<view class="goods-info-box">
			<!-- 商品价格 -->
			<view class="price">&#165;{{ goods_info.goods_price }}</view>
			<!-- 信息主体区域 -->
			<view class="goods-info-body">
				<!-- 商品名称 -->
				<view class="goods-name">{{ goods_info.goods_name }}</view>
				<!-- 收藏 -->
				<view class="favi">
					<uni-icons type="star" size="18" color="gray"></uni-icons>
					<text>收藏</text>
				</view>
			</view>
			<!-- 运费 -->
			<view class="yf">快递：免运费 --- {{ cart.length }}</view>
		</view>
		<!-- 商品的详情信息 -->
		<rich-text :nodes="goods_info.goods_introduce"></rich-text>
		<!-- 商品导航 -->
		<view class="goods_nav">
			<uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup"
							@click="onClick" @buttonClick="buttonClick"></uni-goods-nav>
		</view>
	</view>
</template>

<script>
	import { mapState, mapMutations, mapGetters } from 'vuex'
	export default {
		data() {
			return {
				//商品详情
				goods_info: {},
				options: [
					//左侧按钮组的配置对象
					{
						icon: 'shop',
						text: '店铺'
					},
					{
						icon: 'cart',
						info: 0,
						text: '购物车'
					}
				],
				buttonGroup: [
					{
						text: '加入购物车',
						backgroundColor: '#ff0000',
						color: '#fff'
					},
					{
						text: '立即购买',
						backgroundColor: '#FFA200',
						color: '#fff'
					}
				]
			};
		},
		onLoad(options) {
			const goods_id = options.goods_id
			this.getGoodsDetail(goods_id)
		},
		computed: {
			// 通过...mapState方法，把myCart模块中cart数组映射到当前页面中
			// ...mapState('模块的名称', ['要映射的数据的名称','.......'])
			...mapState('myCart', ['cart']),
			...mapGetters('myCart', ['total'])
		},
		watch: {
			// 监听total值的变化，通过形参拿到改变之后的值
			// 动态的为购物车徽标进行赋值
			
			// total(newVal) {
			// 	// console.log(newVal);
			// 	const findResult = this.options.find( x => x.text === '购物车')
			// 	if(findResult){
			// 		findResult.info = newVal
			// 	}
			// }
			
			total: {
				// handler 属性用来定义侦听器的 function 处理函数
				handler(newVal) {
						const findResult = this.options.find( x => x.text === '购物车')
						if(findResult){
							findResult.info = newVal
						}
				},
				immediate: true
			}
		},
		methods: {
			...mapMutations('myCart',['addToCart']),
			async getGoodsDetail(goods_id){
				const { data: res } = await uni.$http.get('/api/public/v1/goods/detail', { goods_id })
				// console.log(res);
				if(res.meta.status !== 200) return uni.$showMsg()
				//使用字符串方法  replace()  方法，为img标签添加一个行内的style的样式，结局图片底部有空白间隙的问题
				//讲webp的后缀名替换为jpg的后缀名
				res.message.goods_introduce = res.message.goods_introduce.replace(/<img/g, "<img style='display: block'").replace(/webp/g, 'jpg')
				//为数据进行赋值
				this.goods_info = res.message
			},
			//实现轮播图的预览效果
			preview(index){
				uni.previewImage({
					current: index,
					urls: this.goods_info.pics.map(x => x.pics_big)
				})
			},
			//左侧按钮组的点击事件处理函数
			onClick(e){
				console.log(e);
				if(e.content.text === '购物车') {
					//切换到购物车页面
					uni.switchTab({
						url:'/pages/cart/cart'
					})
				}
			},
			buttonClick(e) {
				if(e.content.text === '加入购物车'){
					// 一个商品信息对象
					const goods = {
						goods_id: this.goods_info.goods_id,  //商品id
						goods_name: this.goods_info.goods_name,  //商品名称
						goods_price: this.goods_info.goods_price, //商品价格
						goods_count: 1, //商品的数量
						goods_small_logo: this.goods_info.goods_small_logo, //商品的图片
						goods_state: false, //商品的勾选状态
					}
					// 调用映射过来的方法，把商品的信息对象存放到购物车数据当中
					this.addToCart(goods)
				}
			}
		}
	}
</script>

<style lang="scss">
.goods-detail-container{
	padding-bottom: 50px;
	swiper {
		height: 750rpx;
		.image{
			width: 100%;
			height: 100%;
		}
	}
	.goods-info-box{
		padding: 15px;
		padding-right: 0;
		.price{
			color: #c00000;
			font-size: 18px;
			margin: 10px 0;
		}
		.goods-info-body{
			display: flex;
			justify-content: space-between;
			.goods-name{
				font-size: 13px;
				padding-right: 10px;
			}
			.favi{
				width: 120px;
				font-size: 12px;
				display: flex;
				flex-direction: column;
				justify-content: center;
				align-items: center;
				border-left: 1px solid #dadada;
				color: gray;
			}
		}
		.yf{
			margin: 10px 0;
			font-size: 12px;
			color: gray;
		}
	}
	.goods_nav{
		position: fixed;
		bottom: 0;
		left: 0;
		width: 100%;
	}
}

</style>
